My sister used to carry her bobby sox in her bra but she never thought about dad's razor. Sounds a bit "ethnic" to me.
A classic straight razor would a bit difficult to deploy under pressure and be a bit to big. The single edge blade like what is used in a window scraper is a better option as is a single edge like the old injector blades used. They are also easy to dispose of.
I got that variant from a Cuban guy in the service. Nice fellow albeit a bit strange. He hated communists with a passion and had extensive knowledge of explosives. Escaped when Castro took over. I always suspected he was involved in anti-Castro activities “ala’ the “Company” but never could prove it.
My mother used to carry a five inch hat pin for safety. I carry something a bit larger. Neither she nor I, nor the lady in the article was interesting in being a victim. What’s wrong with that? Waiting on Jones or Smith to come along and save you is a sure trip to the graveyard no matte what ethnicity you are.